I could fever you could fever she could fever we could fever you could fever they could fever
Forma con V-ing
I could be fevering you could be fevering she could be fevering we could be fevering you could be fevering they could be fevering
Perfecto
I could have fevered you could have fevered she could have fevered we could have fevered you could have fevered they could have fevered
Perfecto con V-ing
I could have been fevering you could have been fevering she could have been fevering we could have been fevering you could have been fevering they could have been fevering
Negación
Forma simple
I could not fever you could not fever she could not fever we could not fever you could not fever they could not fever
Forma con V-ing
I could not be fevering you could not be fevering she could not be fevering we could not be fevering you could not be fevering they could not be fevering
Perfecto
I could not have fevered you could not have fevered she could not have fevered we could not have fevered you could not have fevered they could not have fevered
Perfecto con V-ing
I could not have been fevering you could not have been fevering she could not have been fevering we could not have been fevering you could not have been fevering they could not have been fevering
Forma interrogativa
Forma simple
could I fever? could you fever? could she fever? could we fever? could you fever? could they fever?
Forma con V-ing
could I be fevering? could you be fevering? could she be fevering? could we be fevering? could you be fevering? could they be fevering?
Perfecto
could I have fevered? could you have fevered? could she have fevered? could we have fevered? could you have fevered? could they have fevered?
Perfecto con V-ing
could I have been fevering? could you have been fevering? could she have been fevering? could we have been fevering? could you have been fevering? could they have been fevering?
Forma interro-negativa
Forma simple
could I not fever? could you not fever? could she not fever? could we not fever? could you not fever? could they not fever?
Forma con V-ing
could I not be fevering? could you not be fevering? could she not be fevering? could we not be fevering? could you not be fevering? could they not be fevering?
Perfecto
could I not have fevered? could you not have fevered? could she not have fevered? could we not have fevered? could you not have fevered? could they not have fevered?
Perfecto con V-ing
could I not have been fevering? could you not have been fevering? could she not have been fevering? could we not have been fevering? could you not have been fevering? could they not have been fevering?